Gliese 649

Gliese 649
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hercules[1]
Right ascension 16h 58m 08.850s[2]
Declination +25° 44′ 38.97″[2]
Apparent magnitude (V) 9.655[3]
Characteristics
Evolutionary stage Main sequence
Spectral type M1.0V[3]
Apparent magnitude (B) 11.222[1]
Apparent magnitude (R) 8.80[1]
Apparent magnitude (I) 8.000[1]
Apparent magnitude (J) 6.448[3]
Apparent magnitude (H) 5.865[3]
Apparent magnitude (K) 5.624[3]
B−V color index 1.48[3]
V−R color index 0.8
R−I color index 0.8
Astrometry
Radial velocity (Rv)3.76±0.13[2] km/s
Proper motion (μ) RA: −115.314(21) mas/yr[2]
Dec.: −508.087(26) mas/yr[2]
Parallax (π)96.2333 ± 0.0244 mas[2]
Distance33.892 ± 0.009 ly
(10.391 ± 0.003 pc)
Absolute magnitude (MV)9.63[1]
Details
Mass0.524±0.012[4] M☉
Radius0.531±0.012[4] R☉
Luminosity0.04373±0.00045[4] L☉
Surface gravity (log g)4.76±0.04[3] cgs
Temperature3,621+41
−40[4] K
Metallicity [Fe/H]−0.15±0.09[3] dex
Rotation24.89+0.34
−0.35 d[3]
Age2.96±0.51[5] Gyr
Other designations
BD+25 3173, HIP 83043, TYC 2063-00479-1, 2MASS J16580884+2544392[6]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata

Gliese 649 is a small star with an orbiting exoplanet in the constellation Hercules. It has an apparent visual magnitude of 9.7,[3] which is too faint to be seen with the naked eye. The system is located at a distance of 33.9 light years based on parallax, and is drifting further away with a radial velocity of 3.8 km/s.[2]

This is an M-type main-sequence star, a red dwarf, with a stellar classification of M1.0V.[3] It has 52% of the mass of the Sun and 53% of the Sun's girth. In the visible light band, the star is radiating 4.4% of the luminosity of the Sun from its photosphere at an effective temperature of 3,621 K.[4] It is spinning slowly with a rotation period of 24.9 days.[3]

  1. ^ a b c d e Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i j k l Cite error: The named reference Pinamonti2023 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gaidos_et_al_2023 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).